2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/08/2017 | 11:15 AM - 11:30 AM | QUANTIFYING COMMUNITY-LEVEL RESISTANCE AND RESILIENCE TO DISTURBANCE: AN EXAMPLE FROM ONTARIO ZOOPLANKTON COMMUNITIES EXPERIENCING ACIDIFICATION | 302C
QUANTIFYING COMMUNITY-LEVEL RESISTANCE AND RESILIENCE TO DISTURBANCE: AN EXAMPLE FROM ONTARIO ZOOPLANKTON COMMUNITIES EXPERIENCING ACIDIFICATION
Freshwater ecosystems are experiencing altered frequencies and magnitudes of disturbance events, and thus a continued focus for aquatic ecologists is to quantify the resilience of these systems to disturbance. Here, we investigated the applicability of multivariate distance-based metrics for characterizing community-level resilience using gradient simulations, and subsequently present a case study on the relative resilience of freshwater crustacean zooplankton to acidification in Ontario. We found variability among zooplankton communities in their resistance and resilience to the effects of acidification. Inconsistent with our expectations, most minimally-impacted reference communities showed directional trajectories over time. Crustacean zooplankton communities in experimentally acidified lakes displayed patterns consistent with resilient communities able to recover from disturbance. Finally, communities within atmospherically acidified lakes showed varying patterns of resistance and resilience. Changes in environmental conditions have likely influenced the composition of zooplankton communities over the past three decades, explaining some of the variance observed. Overall, our approach of using multivariate distance measures on ordinations provides an effective visual framework to quantify the relative resistance and resilience of communities to disturbance.
- C03 Invertebrates
- C17 Bioassessment
- C11 Community Ecology
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Presenters/Authors
Karl Lamothe
(), University of Toronto, karl.lamothe@mail.utoronto.ca;
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Donald Jackson
(), University of Toronto, don.jackson@utoronto.ca;
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Keith Somers
(), University of Toronto, keith.somers@utoronto.ca;
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